Circuit-interrupter.



H. G. MACDONALD.

` CiRCUlT INTERRUPTER.

APPLICATION FILED MAR. 9. ma.

WITNESSES:

V.. D m w n nn um V.. d 8....

sus

To' all *fiom it' may concern:

Be known: that l, HOWARD G. DONALD, e citizen 'of the United circ s, u* ters end'pertieulerly to oil circuit n errupters embodying s plurality of intercommuniceting electrode recfotecles.

The object of my invention to provide u device of the ebove-indicated character that shell have simple ,and efficient" means tor preventing the transmission of orc eftplosive forces or other disturbing influencesl between the several electrode receptacles through the intercommuniceting moons thereo. f.

Heretofore, it lies been usuel, in some' polyphese circuit interrupters, to provide seperate oil receptacles or tanks for the severalV poles or Contact k members of the several phases oil the circuit, in 1rlich construction it has been usual to connect the movable parts of the seme to s common operating mechanism. This connectie?L has usually comprised s horizontal rod that ettendecl through the wells of the several tanks and ,through relatively large tubular incesingmembers disposed etween the same that constituted e protective covering for the rod. n

Duri; s. the operation of circuit interrupters ot this type, the explosions csusecl'hy breaking of the circuit have sometimes been of such violence as to cause undue pressures within the tanks, such pressures often vary-A ine,1 in intensity in the several receptacles or occurring; 'only in certain of the seme, in which instances the above-mentioned tubular membersprovided means for the transmis sion, between the receptacles, or" disturbing iiuences, such esplosive forces, end spraying oil.

iin pr ising my invention, "i provide means whereby e common operating rod for the several poles of such breaker may be freely movable in the protective tubular casing. between the receptacles, and the transmission therethrough of explosive forces, oil or other disturbing inliuences may be prevented.

The single figure of the accompanying .receptacles 3 and 2l :in

l3nt-entend il, if* i9 drawing; diagrammatic View, partially in section and partially in elevation, of e circuit interrupter embodying my invention.

Receptacles l, of a usual type, having base 'f members 2, side wells 3, cover members 4,

e, inclose stationery Contact members 'l' that ere attached to the lower ends of the bushings 5 within. e body of oil 8, and are adepted for cooperative engagement with movobl-e Contact members 9 'that ere attached to .the lower ends ol"- verticel rods 10.

l The rods l@ ere loosely pivoted tol arms il or" bell-oreille levers l2 that are pivotally supported uponeu fixed member 13, and arms le of .the lever l2 -are loosely pivoted to s iorizontelly extending rodr l5. The rod is common to all of the receptacles l and is loosely pivcted, et one end, to en arml of' e 'bellcranlr lever 17 having e support 18 and an arm 19 loosely pivoted to a vertical rod 2O that extends to en operating mechanism (not shown) inclosed in e casing 2l. A latch 22 cooperates with the erm it! to hold ell of theooperating contact members 7 and 9 in their engaging posi tions, es shown in the drewinof.

rdinerily, plein tubular members inclose the rods l5 end Q0 between the respective d provide :in unrestricted path for explosive forces, spraying oil or other disturbing iniluences that may occur in one of the receptacles.

l provide, at positions intermediate the ends of tubular structures 23 that inclose the rods l5 snd'QO and constitute protective cesings 'or 'the same, between the respec-v tive receptacles to which they are attached, enlarged tubular members 24: having centrally disposed and laterally extending outlettubes 25. Washers 26, loosely mounted upon the rods 15 and 20, are oppositely and resilientlybiasefl by springs 27 against circular flanged interior seat portions 28 et the ends et the members 2li. The rods l5 and.A 2O are, therefore, freely movable in the direc tion of their axes without disturbing the washers 26, When en explosion, caused by an ere between the contact members 7 and 9, occurs in one oitl the receptacles l, the forces resulting therefrom, when too violent to become completely dissipated through the Ventilating tubes 6, cause the washer 26, nearest the receptacle in which the explosion occurs, to move away from its seat. This 4terminzri bushings 5 and ventileting tubes compresses the associated-spring 27 to more tightly seat the opposing Washer 26 and` permit the dissipationcf the forces through the outlet tube 25. The same operation is effective at either end of the structureQ/it accordance with the location of a single explosion or at both ends when explosions oc-v tion with a plurality of substantially in,

closed intercommunieating. electrode-containing receptacles, the transmission of explosive-arc forces from one to another of said receptacles.

2. In a circuit interrupter,` the coinbina.

ltion With a plurality of substantially ini closed electrode-containing receptacles and a tubular communicating member therebetween, of means sive-arc forces from said tubular member.

3. In a circuit interruptor, the combination" with electrodes, an' inclosing casing therefor, an externally disposedelectrodeoperating'mechanism and a hollow inclosead` communicating member extending between said operating mechanism and said easing, of means for preventing the transmission o explosive-arc forces to said mechanism;

4. A circuit interrupter comprising a plurality ofcompartments, a plurality ot contact members disposed in the saine, a tubular structure extending between. the compartments, operating means tor said contact members disposed in said tubular structure and intercommunicating between said compartinents' and means for preventing the transmission ot explosive forces caused by arcs from said contact members through said tubular structure.

of means for preventing extending for diverting exploexteriorly communicating 5. l'n' a circuit interrupter, the combination with a plurality of inclosed recepta cles, contact members therein and substanl tially inclosed communicating means extending therebetiveen, of .means for preventing explosive-arc forces from traversing said communicat-ing'means from any one to any other of said receptacles.

6. The combination with a plurality ot' substantially inclosed vessels, bodies of fluid disposed therein, hollow substantially in'- closed communicating meaiis extending between said vessels, and a movable member extending through said coniniunicating means. of means. for preventing the transmission of said Huid through said communicatingmeans Yfrom one to another of said vessels.

7. -The combination with a plurality of substantially inclosed vessels, hollow subs'tantiallyv siiiclosed.communicating means extending betiveen the saine, and a movable member extending through said communi catingmeans, of means for preventing the transmission of explosive forces through said conimiinicat-ing means from one to ane other of said vessels. u

8. An electrical device comprising a plurality of substantially inclosed fluid-containing vesscls, a hollow substantially inclosed communicating member extending between said vcssels, and means for preventing the transmission of undue fluid pressure troni one to 'another of said vessels, said means comprising a hollow member constitui ing an intermediate portion of each ci' said communicating members, closure nientbers t'or the ends of said hollow member and resilient means` for holding said closure members in position at opposite sides ot an aperture in said hollow member.

In testimony whereof, Ihave hereunto subscribed my name this 28th day of Feb., 1918 HOVARD G. MACDONALD. 

